CN112254134B - System and method for cooperatively treating household garbage by using cement kiln - Google Patents
System and method for cooperatively treating household garbage by using cement kiln Download PDFInfo
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- CN112254134B CN112254134B CN202011101234.7A CN202011101234A CN112254134B CN 112254134 B CN112254134 B CN 112254134B CN 202011101234 A CN202011101234 A CN 202011101234A CN 112254134 B CN112254134 B CN 112254134B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/60—Separating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the field of cement kiln garbage treatment, aims to solve the problems that the treatment capacity is low and the working condition stability of a cement kiln is influenced in the conventional cement kiln and garbage treatment technology, and provides a system and a method for treating household garbage by using a cement kiln and a garbage treatment technology. The cement kiln co-disposal household garbage system comprises a cement kiln system and a garbage feeding system; the cement kiln system comprises a tertiary air pipe and a decomposing furnace communicated with the tail end of the tertiary air pipe; the garbage feeding port is formed in the starting end of the tertiary air pipe; and the garbage feeding system is communicated with the garbage feeding port and is used for feeding the screened garbage oversize products into the starting end of the tertiary air pipe through the garbage feeding port. The invention has the advantages of fully utilizing the existing facilities of the cement kiln, having low investment cost and ensuring larger garbage treatment capacity under the condition of stable working condition of the cement kiln system.
Description
Technical Field
The invention relates to the field of cement kiln garbage treatment, in particular to a system and a method for cooperatively treating household garbage by a cement kiln.
Background
The cement kiln co-processing domestic garbage has the advantages of large processing capacity, high temperature, low investment, alkaline atmosphere, capability of participating in burning ash to clinker, full utilization of heat value and the like, and has recently gained wide attention at home and abroad. The existing cement kiln co-processing household garbage feeding points mainly comprise: a kiln tail decomposing furnace, a kiln tail smoke chamber, a kiln head burner or a kiln door cover throwing point and the like. Because the moisture of the material is higher and the component fluctuation is large, the problems of low disposal capability, influence on a cement kiln system and the like exist no matter the material is added at the head or the tail of the kiln.
Therefore, aiming at the problems of low disposal capability and influence on the stability of the working condition of the cement kiln in the prior art, a novel cement kiln cooperative disposal method and a novel cement kiln cooperative disposal device need to be developed, so that the normal operation of a cement kiln system is not influenced while the household garbage disposal amount is increased.
Disclosure of Invention
The invention aims to provide a system and a method for treating domestic garbage by using a cement kiln in a synergic manner, and aims to solve the problems that the treatment capacity is low and the working condition stability of the cement kiln is influenced in the cement kiln in the prior art in the synergic garbage treatment.
The embodiment of the invention is realized by the following steps:
a cement kiln co-disposal household garbage system comprises a cement kiln system and a garbage feeding system; the cement kiln system comprises a tertiary air pipe and a decomposing furnace communicated with the tail end of the tertiary air pipe; the garbage feeding port is formed in the starting end of the tertiary air pipe; and the garbage feeding system is communicated with the garbage feeding port and is used for feeding the screened garbage oversize products into the starting end of the tertiary air pipe through the garbage feeding port.
In the cement kiln co-processing household garbage system, the garbage feeding port of the garbage oversize products is arranged at the starting end of the tertiary air pipe, so that the space of the tertiary air pipe can be fully utilized, and the garbage oversize products are dried and incinerated in the tertiary air pipe; the incinerated fly ash enters the decomposing furnace under the high-speed action of the tertiary air, so that the deposition of the fly ash in the tertiary air pipe is avoided; meanwhile, after incineration, the temperature of tertiary air is increased, and the influence of low-temperature materials and low-temperature flue gas entering the decomposing furnace on fuel combustion in the furnace is avoided.
From this, cement kiln in this scheme deals with domestic waste system in coordination not only has make full use of the current facility of cement kiln, and investment cost is low effect, can guarantee moreover to have almost no influence to the operating mode stability of cement kiln system.
In addition, practical data show that the treatment capacity of the oversize products of the household garbage can be improved to 15t/h for a typical 5000t/d cement clinker production line by adopting the scheme.
In one embodiment:
the cement kiln domestic garbage co-disposal system further comprises garbage screening equipment which is used for screening garbage into garbage oversize products mainly comprising organic components and garbage undersize products mainly comprising inorganic substances.
In one embodiment:
the garbage feeding system comprises a buffering feeding device, a metering device and a feeding air locking device which are sequentially communicated, and the feeding air locking device is communicated with the garbage feeding port.
In one embodiment:
the feeding mode in the feeding air locking device adopts a mechanical mode, and garbage oversize materials are fed into the starting end of the tertiary air pipe through the garbage feeding port through mechanical feeding.
In one embodiment:
the feeding mode in the feeding air locking device adopts a pneumatic mode, and garbage oversize materials are conveyed into the starting end of the tertiary air pipe through the garbage feeding port through pneumatic conveying.
In one embodiment:
the tertiary air pipe of the cement kiln system is obliquely arranged, and the starting end of the tertiary air pipe is lower and the end communicated with the decomposing furnace is higher.
The scheme also provides a method for cooperatively disposing household garbage by using the cement kiln, which is based on the system for cooperatively disposing the household garbage by using the cement kiln, and the method comprises the following steps:
after the domestic garbage is pretreated and sorted, domestic garbage oversize products with organic components as main components and undersize products with inorganic components as main components are obtained;
feeding the oversize material of the household garbage into the starting end of a tertiary air pipe from a garbage feeding port; under the action of tertiary air in the tertiary air pipe, the garbage oversize products are quickly dried and combusted in the tertiary air pipe; the smoke, fly ash and unburned part generated by combustion are blown into the decomposing furnace along the tertiary air pipe by the tertiary air, and are continuously burnt out in the decomposing furnace, and the fly ash in the decomposing furnace is mixed into the cement raw materials to participate in the calcination of the cement clinker.
In one embodiment:
the garbage feeding system comprises a buffering feeding device, a metering device and a feeding air locking device which are sequentially communicated, and the feeding air locking device is communicated with the garbage feeding port, so that garbage oversize materials are uniformly and stably fed.
In one embodiment:
setting the air temperature at the starting end of the tertiary air pipe at 800-1000 ℃ and the air speed more than 25 m/s.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings referred to in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings may be obtained from these drawings without inventive effort.
FIG. 1 is a schematic structural diagram of an embodiment of a system for co-disposing household garbage in a cement kiln according to an embodiment of the present invention (the tertiary air direction is additionally shown by an arrow flow);
fig. 2 is a schematic structural diagram of another embodiment of the cement kiln co-disposed domestic waste system in the embodiment of the present invention (the tertiary air direction is additionally shown by an arrow flow).
Icon: the system comprises a cement kiln co-disposal household garbage system 10, a cement kiln system 11, a garbage feeding system 12, a tertiary air pipe 13, a tail end 14, a decomposing furnace 15, a kiln head cover 16, a rotary furnace 17, a smoke chamber 18, a starting end 19, a garbage feeding port 20, a buffer feeding device 21, a metering device 22, a feeding air locking device 23 and a pneumatic conveying device 24.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The inventor researches in practical work to find that the oversize products of the household garbage are treated by the kiln tail, and when the treatment amount is less (less than or equal to 5t/h, aiming at a typical cement clinker production line of 5000 t/d), the influence on the system is not obvious; however, when the amount of the disposed materials is increased, the evaporation of a large amount of low-temperature materials and moisture easily causes the fluctuation of the temperature and the oxygen content of the smoke in the decomposing furnace, the operation of the decomposing furnace is unstable, the kiln condition is unstable, and the clinker yield and the amount of the disposed materials on the domestic garbage sieve are influenced.
The oversize materials of the household garbage are treated through the kiln head, and when the treatment amount is less (less than or equal to 2t/h, aiming at a typical 5000t/d cement clinker production line), the influence on the system is not obvious; however, when the treatment amount is increased, kiln skins fall off, the working condition of the rotary kiln fluctuates, and the quality and the yield of clinker are affected.
Therefore, the two schemes can not meet the two requirements of garbage treatment capacity and stable kiln working condition.
In view of this, the applicant has proposed the solutions as described in the examples below.
Examples
Referring to fig. 1 or 2, the present embodiment provides a cement kiln co-disposed domestic waste system 10, which includes a cement kiln system 11 and a waste feeding system 12.
The cement kiln system 11 comprises a tertiary air pipe 13 and a decomposing furnace 15 communicated with the tail end 14 of the tertiary air pipe 13. In addition, the cement kiln system 11 generally includes a kiln head cover 16 of the grate cooler, a rotary kiln 17, a smoke chamber 18 and other common structures. One end of the tertiary air pipe 13 is communicated with the kiln head cover 16, the tail end 14 is communicated with the decomposing furnace 15, the tertiary air pipe 13 of the cement kiln system 11 is obliquely arranged, and the starting end 19 of the tertiary air pipe 13 is lower and the end communicated with the decomposing furnace 15 is higher.
In this embodiment, the garbage feeding port 20 is provided at the starting end 19 of the tertiary air pipe 13; the garbage feeding system 12 is communicated with a garbage feeding port 20 and is used for feeding screened garbage oversize products into a starting end 19 of the tertiary air pipe 13 through the garbage feeding port 20.
In the system 10 for cooperatively treating household garbage by using the cement kiln, the garbage feeding port 20 for oversize garbage is arranged at the starting end 19 of the tertiary air pipe 13, so that the space of the tertiary air pipe 13 can be fully utilized, and the oversize garbage is dried and incinerated in the tertiary air pipe 13; the incinerated fly ash enters the decomposing furnace 15 under the high-speed action of the tertiary air, so that the deposition of the fly ash in the tertiary air pipe 13 is avoided; meanwhile, the temperature of the tertiary air is increased after incineration, and the influence of low-temperature materials and low-temperature flue gas entering the decomposing furnace 15 on the combustion of fuel in the furnace is avoided.
From this, cement kiln in this scheme deals with domestic waste system 10 in coordination not only has make full use of the current facility of cement kiln, and investment cost is low effect, can guarantee moreover to have almost no influence to the operating mode stability of cement kiln system 11.
In addition, practical data show that the treatment capacity of the oversize products of the household garbage can be improved to 15t/h for a typical 5000t/d cement clinker production line by adopting the scheme.
In this embodiment, the system 10 for treating domestic garbage with cement kiln further comprises a garbage sieving device (not shown in the figure) for sieving garbage into garbage oversize products mainly containing organic components and garbage undersize products mainly containing inorganic components. The domestic garbage can be pretreated by crushing and the like before being screened, and the oversize garbage and the undersize garbage can be separated by screening and air separation and the like through garbage screening equipment after being crushed.
The garbage feeding system 12 comprises a buffer feeding device 21, a metering device 22 and a feeding air locking device 23 which are sequentially communicated, and the feeding air locking device 23 is communicated with a garbage feeding port 20. The feeding air-lock device 23 in this embodiment may adopt mechanical feeding or pneumatic feeding. When the feeding mode in the feeding air locking device 23 is mechanical, the oversize garbage is fed into the starting end 19 of the tertiary air pipe 13 through the garbage feeding port 20 by mechanical feeding. When pneumatic feeding is adopted, the oversize garbage is fed into the starting end 19 of the tertiary air pipe 13 through the garbage feeding port 20 by the pneumatic conveying equipment 24 in cooperation with the feeding device shown in fig. 2.
The embodiment also provides a method for the cement kiln co-disposal of household garbage, which is based on the aforementioned system 10 for the cement kiln co-disposal of household garbage, and the method includes the following steps:
after the domestic garbage is pretreated and sorted, domestic garbage oversize products with organic components as main components and undersize products with inorganic components as main components are obtained;
feeding the oversize material of the household garbage into an initial end 19 of a tertiary air pipe 13 from a garbage feeding port 20; under the action of the tertiary air in the tertiary air pipe 13, the air temperature of the starting end 19 of the tertiary air pipe 13 can be set to be 800-; the garbage oversize materials are quickly dried and combusted in the tertiary air pipe 13; the flue gas, fly ash and unburned components generated by combustion are blown into the decomposing furnace 15 along the tertiary air pipe 13 by the tertiary air, and are continuously burned out in the decomposing furnace 15, and the fly ash in the decomposing furnace 15 is mixed into the cement raw materials to participate in the calcination of the cement clinker.
The garbage feeding system 12 comprises a buffering feeding device 21, a metering device 22 and a feeding air locking device 23 which are sequentially communicated, and the feeding air locking device 23 is communicated with the garbage feeding port 20, so that garbage oversize materials are uniformly and stably fed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a cement kiln is domestic waste system of handling in coordination which characterized in that:
comprises a cement kiln system and a garbage feeding system;
the cement kiln system comprises a tertiary air pipe and a decomposing furnace communicated with the tail end of the tertiary air pipe; the garbage feeding port is formed in the starting end of the tertiary air pipe;
the garbage feeding system is communicated with the garbage feeding port and is used for feeding screened garbage oversize products into the starting end of the tertiary air pipe through the garbage feeding port;
the tertiary air pipe of the cement kiln system is obliquely arranged, and the starting end of the tertiary air pipe is lower and the end communicated with the decomposing furnace is higher.
2. The cement kiln co-disposed domestic waste system according to claim 1, wherein:
the cement kiln domestic garbage co-disposal system further comprises garbage screening equipment which is used for screening garbage into garbage oversize products mainly comprising organic components and garbage undersize products mainly comprising inorganic substances.
3. The cement kiln co-disposed domestic waste system according to claim 1, wherein:
the garbage feeding system comprises a buffering feeding device, a metering device and a feeding air locking device which are sequentially communicated, and the feeding air locking device is communicated with the garbage feeding port.
4. The cement kiln co-disposed domestic waste system according to claim 3, wherein:
the feeding mode in the feeding air locking device adopts a mechanical mode, and garbage oversize materials are fed into the starting end of the tertiary air pipe through the garbage feeding port through mechanical feeding.
5. The cement kiln co-disposed domestic waste system according to claim 3, wherein:
the feeding mode in the feeding air locking device adopts a pneumatic mode, and garbage oversize materials are conveyed into the starting end of the tertiary air pipe through the garbage feeding port through pneumatic conveying.
6. A cement kiln co-disposal household garbage method is characterized in that the cement kiln co-disposal household garbage system based on any one of claims 1-5 comprises the following steps:
after the domestic garbage is pretreated and sorted, domestic garbage oversize products with organic components as main components and undersize products with inorganic components as main components are obtained;
feeding the oversize material of the household garbage into the starting end of a tertiary air pipe from a garbage feeding port; under the action of tertiary air in the tertiary air pipe, the garbage oversize products are quickly dried and combusted in the tertiary air pipe; the smoke, fly ash and unburned part generated by combustion are blown into the decomposing furnace along the tertiary air pipe by the tertiary air, and are continuously burnt out in the decomposing furnace, and the fly ash in the decomposing furnace is mixed into the cement raw materials to participate in the calcination of the cement clinker.
7. The cement kiln co-disposal household garbage method according to claim 6, characterized in that:
the garbage feeding system comprises a buffering feeding device, a metering device and a feeding air locking device which are sequentially communicated, and the feeding air locking device is communicated with the garbage feeding port, so that garbage oversize materials are uniformly and stably fed.
8. The cement kiln co-disposed domestic waste method according to claim 7, characterized in that:
setting the air temperature at the starting end of the tertiary air pipe at 800-1000 ℃ and the air speed more than 25 m/s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011101234.7A CN112254134B (en) | 2020-10-15 | 2020-10-15 | System and method for cooperatively treating household garbage by using cement kiln |
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| CN202011101234.7A CN112254134B (en) | 2020-10-15 | 2020-10-15 | System and method for cooperatively treating household garbage by using cement kiln |
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| CN112254134B true CN112254134B (en) | 2021-11-30 |
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| CN112944361B (en) * | 2021-01-29 | 2022-07-19 | 吉林化工学院 | Process system for cooperatively treating oil sludge by using cement kiln |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3425099A1 (en) * | 1984-07-07 | 1986-02-06 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Installation for the treatment of finely grained material, especially cement raw meal |
| US20080245275A1 (en) * | 2005-09-20 | 2008-10-09 | Markus Mohr | Plant and Method for the Production of Cement Clinker from Cement Raw Material |
| CN103626409A (en) * | 2013-11-27 | 2014-03-12 | 北京建筑材料科学研究总院有限公司 | Method and device for treatment in feeding household garbage into cement kiln in three routes |
| CN203768247U (en) * | 2014-04-16 | 2014-08-13 | 南京凯盛国际工程有限公司 | Clinker firing system capable of taking carbide slag as calcareous raw material and treating waste incineration flue gas |
| CN109654502A (en) * | 2018-05-30 | 2019-04-19 | 华润环保工程投资有限公司 | A method of using hot plate furnace Direct Disposal multiphase solid waste |
-
2020
- 2020-10-15 CN CN202011101234.7A patent/CN112254134B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3425099A1 (en) * | 1984-07-07 | 1986-02-06 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Installation for the treatment of finely grained material, especially cement raw meal |
| US20080245275A1 (en) * | 2005-09-20 | 2008-10-09 | Markus Mohr | Plant and Method for the Production of Cement Clinker from Cement Raw Material |
| CN103626409A (en) * | 2013-11-27 | 2014-03-12 | 北京建筑材料科学研究总院有限公司 | Method and device for treatment in feeding household garbage into cement kiln in three routes |
| CN203768247U (en) * | 2014-04-16 | 2014-08-13 | 南京凯盛国际工程有限公司 | Clinker firing system capable of taking carbide slag as calcareous raw material and treating waste incineration flue gas |
| CN109654502A (en) * | 2018-05-30 | 2019-04-19 | 华润环保工程投资有限公司 | A method of using hot plate furnace Direct Disposal multiphase solid waste |
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